Waveform Control
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. An automatic gain control circuit to improve ECG acquisition
Abstract Introduction Long-term electrocardiogram (ECG) recordings are widely employed to assist the diagnosis of cardiac and sleep disorders. However, variability of ECG amplitude during the recordings hampers the detection of QRS complexes by algorithms. This work presents a simple electronic circuit to automatically normalize the ECG amplitude, improving
Res. Biomed. Eng.. Publicado em: 30/11/2017
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2. Construction and measurement of an electromagnetic noise generator based on an automotive coil
This article covers the design of an electromagnetic noise generator which uses an automotive coil as the main component. A short theoretical analysis covers the generation of high voltage pulsed current from the available DC source originated from the battery. An electronic dimmer, a circuit used to control the brightness of a light, by controlling the effe
Rev. Bras. Ensino Fís.. Publicado em: 22/06/2017
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3. Hardware embedded fiber sensor interrogation system using intensive digital signal processing
The description of an interrogation system for fiber Bragg grating sensors is reported. The full implementation in hardware of the required signal processing is proposed and made publicly available. The hardware description is implemented in a field programmable gate array (FPGA) development kit and the processing units allow one to control an optoelectronic
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12
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4. Papel de SOCS2 na resposta imune e função cardíaca durante a infecção experimental por Trypanosoma cruzi
Infection with Trypanosoma cruzi induces robust inflammation that limits parasite proliferation but may result in Chagas heart disease. The 5-Lipoxygenase pathway induces suppressor of cytokine signaling(SOCS)2 expression, an important regulator of immune responses. Here, we investigated the role of SOCS2 for the pathogenesis of T. cruzi infection. We invest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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5. Avaliação de Processos GMAW Duplo-Arame em Baixa Corrente com Controle do Formato de Onda e com Auxílio de Feixe de Laser / Assessment of Low Current Tandem GMAW Processes with Waveform Control and with Aid of Laser Beam
In face of manufacturing-related limitations in the present-day industry, the welding sector has looked for new, or even not so new, processes. In other words, it has invested in the development of new processes and, especially, in the use of new arrangements for conventional processes. Thus, the aim of this work was to assess the use of combined processes a
Publicado em: 2009
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6. DESIGN OF A COMMERCIAL APPROACH OF ELECTRONIC BALLASTS TO SUPPLY HIGH-PRESSURE SODIUM LAMPS IN PUBLIC LIGHTING / SISTEMATIZAÇÃO DO PROJETO DE REATORES ELETRÔNICOS PARA ALIMENTAÇÃO DE LÂMPADAS DE VAPOR DE SÓDIO EM ALTA PRESSÃO PARA ILUMINAÇÃO PÚBLICA
This thesis presents an electronic ballast prototype to supply high-pressure sodium lamps used in public lighting. The goal is to develop a commercial approach able to replace the still commonly used electromagnetic ballasts, performing improvements in the public lighting system. Along this thesis, the state of art in lighting area is presented, especially i
Publicado em: 2009
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7. Virtual instrumentation applied to electrical engineering education. / Instrumentação virtual aplicada ao ensino experimental de engenharia elétrica.
The proposal of this work is to present some potential applications of the software LabVIEW, from National Instruments, associated with data acquisition hardware, applied to experiments in the Electric Energy Systems area as a tool to support the presential education. This dissertation shows the developing of an experience in a electric energy system laborat
Publicado em: 2007
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8. Desenvolvimento de conversor comutado em baixa frequencia para aplicação em sistemas de geração distribuida baseados em celulas a combustivel / Development of a low-frequency commutation converter for distributed generation system based on fuel cells
The connection of distributed power sources with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. This work presents a system intended to low-power distributed generation composed by a DC primary source, as a fuel cell. A boost converter connects the supply to an
Publicado em: 2006
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9. Gerador de indução associado a inversor PWM operando com frequencia constante
Some alternatives to the three-phase cage-rotor induction machine application in electric power generation were analyzed in this investigation. The proposed generation systems ensure satisfactory energy quality, as they are able to maintainbalanced three-phase voltage, with sinusoidal waveform and constant frequency at 60Hz. These systems are intended to be
Publicado em: 1999
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10. CONTROL OF THE WAVEFORM OF OSCILLATIONS OF THE REDUCED PYRIDINE NUCLEOTIDE LEVEL IN A CELL-FREE EXTRACT
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11. The mechanism of prediction in human smooth pursuit eye movements.
1. Experiments have been conducted on human subjects to determine the role of prediction in smooth eye movement control. Subjects were required to actively pursue a small target or stare passively at a larger display as it moved in the horizontal plane. 2. Target motion was basically periodic, but, after a random number of cycles an unexpected change was mad
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12. IC138 Is a WD-Repeat Dynein Intermediate Chain Required for Light Chain Assembly and Regulation of Flagellar Bending
Increased phosphorylation of dynein IC IC138 correlates with decreases in flagellar microtubule sliding and phototaxis defects. To test the hypothesis that regulation of IC138 phosphorylation controls flagellar bending, we cloned the IC138 gene. IC138 encodes a novel protein with a calculated mass of 111 kDa and is predicted to form seven WD-repeats at the C
The American Society for Cell Biology.